The document discusses functions in mathematics and provides examples of evaluating different functions based on input-output tables: 1) It introduces functions in real life and mathematics, and provides the example function y=x+3, showing how to fill out an input-output table for it. 2) More examples of functions are given as practice problems for the reader to fill out tables for, including y=x-4 and y=-3x. 3) An input-output table is shown for the function y=2x+3 to evaluate. 4) A more difficult function is presented as y=x/-3, with an empty table for the reader to solve. 5)

1. https://www.youtube.com/watch?v=ZkEHA-wixDw

2. Input-Output Tables

3. Functions in real life

4. Functions in math

5. Example of a function: y=x+3
y=x+3 y=x+3
x y
1
5 y=x+3
7
fill out table

6. Your turn: y=x-4
x y
12
14
15

7. Your turn: y = -3x
x y
1
2
3

8. What about this one: y = 2x + 3
x y
1
2
3

9. x
A little more difficult: y= -3
2
x y
6
10
14

11. Can you do it backwards?

12. I'll give you the table, you find the function
x y x y
5 1 2 100
7 3 3 150
10 6 4 200